Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: FTWOTXGLRP0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
817-429 A Glendale EMS TX 9533 SOUTHWESTERN BELL 552      
817-446 A Glendale TX 9533 SOUTHWESTERN BELL 552      
817-451 A Glendale TX 9533 SOUTHWESTERN BELL 552      
817-457 A Glendale TX 9533 SOUTHWESTERN BELL 552      
817-492 A Glendale TX 9533 SOUTHWESTERN BELL 552      
817-496 A Glendale TX 9533 SOUTHWESTERN BELL 552      
817-654 A Glendale EMS TX 9533 SOUTHWESTERN BELL 552      
817-930 A Glendale EMS TX 9533 SOUTHWESTERN BELL 552      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.